Just noticed your repo from 'Discover Repositories'
Highlighting a problem with Alpine Linux and Ruby 2.5.
Just so that users do know there is a current issues around this.
https://qiita.com/koshigoe/items/7acebbab7b44fa2b35bc
https://bugs.ruby-lang.org/issues/14387#change-69850
Your ruby version is 2.5, so your users have to be aware of this issue.
Cheers